E C G Sudarshan: Quantum catalyst

A survey of Sudarshan's works is presented to show that his brilliant role in advancing science on many fronts has been like a catalytic agent which, by definition, plays a singular role in increasing the rate of a process, but remains hidden, and is unchanged at the process end. As might be necessary to remain catalytically active for a lifetime, his broad and seminal contributions to science have often gone unappreciated, and rarely given due honor – unfortunately at a great cost to scientific progress.